Steam-engine



(No Model.) 2 Sheets-Sheet 1.

E. W; MYERS & O. D. BRADLEY.

(NoModeL) 2 Sheets -S,heet 2.

E. W. MYERS & O. D. BRADLEY.

- STEAM ENGINE; v No. 251,920. Patented Jan. 3,1882.

I IIIIIIIII support for the engine, which may be varied o journaled'in suitable boxes, F, and having a UNITED STATES PATENT OFFICE.

ENOS W. MYERS AND CARLOS D. BRADLEY, OF MAUEDONIA,'IOWA.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 251,920,.dated January 3, 1882.

Application filed October 6, 1881. (No model.)

To all whom. it may concern:

Be it known that. we, E. W. MYERS and G. D. BRADLEY, both citizens of the United States, of Macedonia, in the county of Pottawattamie and State of Iowa, have invented a new and valuable Improvement in Steam- Engines, and we do. hereby declare that the following is'a full, clear, and exact description of the construction and operation of the same, reference being bad to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a side view, partly broken away. Fig. 2 is a vertical section, and Figs. 3 and 4 are detail views.

This invention has relation to rotary steamengines; .and it consists in the novel construction and arrangement of parts, as will be hereinafter fully described and be particularly pointed out in the claims.

Referring by letter to the accompanying drawings, A designates any suitable base or to conform to the location in which the engine is to be employed. 0

B designates an annular casing, having a groove, 0, in its inner-periphery.

D designates a- Wheel mounted on a shaft, E,

groove, G, in its outer periphery, the grooves O and G, when the parts of the engine are properly united, forming the bore of the cylinder.

H H are rings forming portions of the easing, which are secured to the portion B of the casing by bolts and nuts, as shown, and which, when suitably packed, render the cylinder steam-tight. The rings H H are removable and permit the removal of the wheel from the casing when necessary.

I designates a head-block having vertical ends and a fiat top, and whichis semicircular or half-round in cross-section. This head-block is located in the groove G of the wheel D, beneath the steam-chest J and between the ports K L of the same, where it is secured by a screw, a, and spring b, which provides sufficieut elas ticity to permit the wheel to revolve.

M designates the supply-pipe, N the escapepipe,and O the blow-off.

The steamehest J is provided with a sliding valve, P, which is sufficiently long to cover both the ports K and L when occupying a middle position in the steam-chest. A rod, 0, passed through a packed box, 01, at one end of the steam-chest, connects thesIiding valve P with a lever, Q, pivoted to an arm, Q, extending from the steam-chest, and adapted to slide on a curved arm, R, also extending from the same end of the steam-chest, whereby the valve may be operated to start, stop, and reverse the engine by moving it to uncover the port K, cover both ports to stop the engine, or uncover the port L to reverse the engine. 7

The wheel D is provided with stem-valves S T, having half-round points to fit the groove 0, the stems of which are passed through boxes U U, attached to or forming part of the wheel D, at diametrically-opposite points thereof, and suitably packed to make them steam-tight. The stems V of these valves S T are passed through perforations f in arms V between the spokes of the wheel D, and are provided with cross-heads W, secured thereto by set-screws g and spiral springs X, abutting against the cross-heads W and arms V, to hold the valves S T to their normal positions when notacted upon bylthe semicircular guides Z Z, secured to the rings H H by the arms Y, four in numher, as shown. Steam being admitted to the steam-chest and the sliding valve moved to uncover the port K,the steam will drive the valve S around and will escape at the pipe N. As the valve S is forced around, the cross-head W on the stem of the valve T passes under the semicircular guides Z Z and draws the valve T down, so that it will pass the headblock I. Thus while one of the valves S or T is passing the head-block the other valve is under the full pressure of the steam, so that the full power of the steam is maintained and there is no dead-center to overcome.

locks Y are provided for the water of condensation. Cogs, belts, and band-wheels may be applied to the shaft of the wheel to transmit the motion from the engine to the machinery to be driven.

Having thus fully described our invention, what we desire to secure by Letters Patent is- 1. In a rotary steam-engine, the combina tion of the grooved stationary casing B O, the

grooved wheel D G, and the packing-rin gs H H, forming portions of the casing, whereby, When said parts are united, the bore of the cylinder is formed, substantially as specified.

2. In a rotary steam-engine having the grooved casing and the rings H, the wheel D, carrying the stem -valves S T, having halfround p ints and stems passed through the boxes U U and perforationsfin arms V between the spokes of the wheel D, the crossheads W, and spiral springs X, to hold the valves to their normal positions when not actuated by the guides Z Z, substantially as specified.

In testimony that we claim the above we [5 have hereunto subscribed our names in the presence of two witnesses.

ENOS W. MYERS. CARLOS D. BRADLEY.

- Witnesses:

HENRY KENNEDY, E. O. BAILEY. 

